Genicom MatrixPrinter LA36 - Manual (Page 108)

5-21
The MPU (MB90706) has the following main functions:
Timing controller
Dynamic RAM controller
Address decoder
Interface controller
Motor controller
Figure 5.20 MB90706 block diagram
CLK
SPM00~03
SPI01~02
Space motor
control circuit
LFM00~03
LFI01~02
Paper feed
motor control
circuit
CLM00~03 Color ribbon
shift motor
control circuit
*CS00X~04X
*IOSX
*OASX
Chip select
decoder
8
×
8 data
converter
MA00~01 Quasi-SRAM
and DRAM
controller
Control panel
control citcuit
*OPDOT
*SHIFT
*LOAD
*RAS
*CAS
*CASH
*LOAD
HDTIN
BZCLK
Timer
control
circuit
Analog to
digital
converter *THSN
MPSEN
LV34
*SDIN
RS-232C
interface
control
circuit
*FLTO
*RC
RCD
*DTR
*TD
*RTD
*RD
*DSR
*CTS
*CD
EXPRM
INPRM
DSTB
*ACK
BUSY
*FAULT
SLCT
*AFXT
*SLCTIN
DATA01~08
X0
X1
RST
Centronics
interface
control
circuit
Clock
control
circuit
CPU
F
2 MC-16
ADDRESS
DATA